Carbureter.



J. M. EVANS.

CARBURETER.

APPLICATION FILED MAR-31,1915.

Patented July 3, 1917.

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JAMES M. EVANS, OF WESTPOIRT, CONNECTICUT, ASSIGNOR TO EVANS ENGINE COM- IPANY, INCORPORATED, A CORPORATION OF NEW YORK. v

CABIBURETER. I

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.new and useful Improvements in Carbureters, of which the following is a description.

In my application, Serial No. 866,27 6, filed @ctober 12, 1914, I havedescribed a carbureter comprising a reservoir chamber for liquid, a mixing chamber and means for conveying charges of liquid from the reservoir chamber to the mixing chamber.

My present invention relates to devices of this same character, and has for its object the provision of means for regulating the charges of. liquid conveyed to the mixing chamber to thereby vary the relative amoun of liquid in the resulting mixture.

@ther objects and features of my invention .vvill appear from the following description and the claims appended thereto.

In the drawing, Figure 1 is a longitudinal sectional view of my improved apparatus with the parts adjusted so that the charges of liquid conveyed from one chamber to the other are relatively large;

Fig. 2 is a similar view but showing the parts adjustedfrom the maximum charge to no charge;

Fig. 3 is a section taken onthe line '33 of Fig. 1;

Fig. i is .a section taken on the line H of Fig. 3; and v Fig. '5 is a plan view of a portion of the mechanism illustrated'in Fig. 3.

In the drawings, the numeral 1 designates the mixing chamber for the liquid fuel and air and when the device is used with an internal combustion engine this chamber may be a part of the intake pipe or manifold of the engine. The air passes through this chamber and charges of the liquid fuel are I delivered to it periodically as may be required. A liquid fuel or reservoir chamber 2 is located adjacent the mixing chamber and is supplied with liquid through the pipe 4. The pressure or head of the liquid should be such as not only to fill the chamber 2, but preferably to keep the liquid'therein under slight pressure; but, while preferable, pressure is not required for its successful operation. The numeral 3 designates a passage leading from the fuel reservoir 2 to the mix- Specification of Letters Patent.

ing chamber 1. 5 designates a reciprocating plunger or carrier for the liquid adapted to slide in the passage 3, connecting the fuel chamber and the mixing chamber. plunger or carrier is made in-two parts, viz., an inner plunger element having a stem 6 and an enlarged head 7 and an outer plunger element 8 mounted as a sleeve on the stem 6 of the inner element and of the. same section as the head 7 The inner faces of the element 8 of the head 7 are so shaped as to come in contact when brought together and are preferably perpendicular to the major axes of the outer element 8 and of the head 7. The stem 6 fits snuglyinto the outer element 8 and is preferably of a circular .section, but may be of any section. The head 7 and the outer element 8 are also preferably of circular section and cylindrical in form, but this is not essential. Both the head 7 and the outer element 8 fit snugly in and'slide through the passage 3. The length of the passage?) is greater than the maximum distance between the faces of the head 7 and the outer element 8 when in the cycle of operation. Thetwo plunger elements 6-7 and 8 are independently con-- trolled by cams or other suitable mechanism to cause them to reciprocate between the reservoir chamber and the mixing chamber.

The parts above described are substantially the same as those described in my aforesaid application and, in order that the object; and efiect of my present invention may be more clearly understood, I will now describe briefly the operation of the above described mechanism, assumed for illustration in a vertical position, but it may be operated in any position.

Referring to Fig. 1, the plu'nger 5 is seen.

to be, substantially in its lowermost position, and the head 7 and plunger 8 are separated the maximum distance, leaving recess 11 therebetween. This recess. will be filled with the liquid present in the reservoir 2 Patented July 3, 19ft. Application filed Mar-elf a1, 1915. Serial m. 18,239.

100 and upon the upward movement of the plunthis discharge of the liquid, the plunger elements are returned to the reservoir chamber 2 and the plunger elements 67 then descend relatively to the plunger element 8, until the desired interval or recess exists between the head 7 and the plunger 8. The

' cycle of operation above outlined is then tions shown in Fig. 2, the amount of liquid in the charge will be correspondingly reduced. In order to regulate the charges of liquid delivered to the mixing chamber from the desired maximum as the upper limit to nothing as the lower limit, I have, therefore, provided means for regulating the size of this recess or, in other words, regulating the distance between the head 7 and the plunger 8, during the cycle of operation. The means by which I accomplish this regulation will now be described.

The cams 9 and 10 coiiperate with the cam rolls 9', 10', to effect the independent reciprocation of the plunger elements 8 and 67, respectively. In order to vary the eX-- tent of relative movement between the two plunger elements, I may adjust in any suitable manner, the actuating means of one of said elements. 1 g

In this particular embodiment of my invention, I have shown means for varying the contour of the cam 10 to thereby vary the extent of reciprocation of the plunger element 6-7 and, consequently, the amount of relative movement between the two plunger elements and the size of the recess 11.

The cam 9 is formed in the disk 12, mounted on the shaft 13, which may be driven from any suitable source. The cam 10 is formed in two separate substantially semi-circular disks or cam sections 14, 15, mounted within the disk 12. One of these semi-circular disks here shown as the disk 15 is adjustable relatively to theother of said disks to vary the contour of the cam 10. In Fig. 1, for instance, the disk 15 is in its extreme position away from the disk 14; and, in Fig. 2, the two disks are in contact. The adjacent edges of the disks are dove-tailed, as shown at 16, in order to form a complete path for the cam roll 10, irre spective of the position of the disk 15.

Any suitable means may be'employed for effecting the relative adjustment between these cam sections 14, 15, the means which I have chosen for the purpose of illustration, being shown in Figs. 3, 4 and 5. The disk 15 is guided for movement upon the disk 12 by the pins 17, connected to the disk 15 and passing through slots 17 in the disk 12. Secured to these pins 17, on the opposite side of the disk 12, is the plate 18, to which is secured the actuating pin 19, which cooperates with a cam slot 20, in the disk 21. Thus, it is seen that by turning the disk 21 relatively to the disk 12, the pin 19, and consequently the disk 15, will be moved toward or from the disk 14, to vary the contour of the cam 10, as above described. The means illustrated for moving the disk 21 relatively to the disk 12 consists of the longitudinally shiftable sleeve 22 mounted on the extended hollow hub 23 of the disk 21, a pin 24 passing through the sleeve 22, hollow hub 23 and shaft 13, and means such as the lever 25 for shifting the sleeve 22 longitudinally of the shaft 13. The pin 24 passes through circular holes 26 in opposite sides of the sleeve 22 and is secured therein.

It also passes through the diagonal slots 27 in opposite sides of the hollow hub 23, and through the longitudinal slot 28 in the shaft 13.

During the normal operation of the device, power is transmitted from the shaft 13, through the pin 24, to rotate the disk 21 and sleeve 22 synchronously with the rotation of the disk 12, to which the shaft is secured by some suitable means, such as the pin 29. When, however, it is desired to vary the amount of liquid delivered to the mixing chamber in each charge or, in other words, to regulate the charges, the sleeve 22 is adjusted longitudinally of the shaft 13, by means of the lever 25, with the result that the pin 24 is moved longitudinally in the longitudinal slot 28 of shaft 13, thereby having a camming effect on hub 23 through the diagonal slot 27, and turning this hub and the disk 21 with relation to the shaft 13. This results in a relative .rotary movement between the disk 21 and disk 12 and, through the action of the pin 19 and cam slot 20, effects the desired movement of the disk 15, with respect to the disk 14.

From the above it is apparent that I have provided convenient and accurate means for regulating the charges of liquid delivered from the reservoir chamber to the mixing chamber, which means may be operated equally well whether the machine is stationary or in operation.

I have shown a particular embodiment of my invention as an illustration of an operative mechanism in connection with which it may be used, but I do not wish to limit my invention to this or any particular embodiment thereof, since many changes may be made therein by those skilled in the art without departing from the spirit of my invention.

What I claim is: I 1. In a device of the kind described, the

combination of a reservoir chamber for liquid; a mixing chamber for the passage of air or other gas; a passage connecting the two chambers, acarrier for the liquid adaptsage of air vor other gas; a passage connecting the two chambers; a carrier for the liquid adapted to move through said passage from one chamber to the other; said carrier comprising two relatively movable parts; a cam for independently moving each of said a parts; one of said cams comprising two cam sections; and means for adjusting one of said cam sections relatively to the other to vary the amount of relative movement between said parts, substantially as described.

8. in a device of the kind described, a combination of a reservoir chamber for liquid; a mixing chamber for the passage of air or other gas; a passage connectin the two chambers; a carrier for the liquid adapted to move through said passage from one chamber to the other, said carrier comprising two relatively movable parts; a cam for independently moving each of said parts,

one of said cams comprising two cam sections; and means for adjusting one of said cam sections relatively to the other to vary the amount of relative movement between said parts, comprising a cam disk operatively connected to the first mentioned cam section, and means for moving said cam disk relatively thereto, substantially as described.

4. In a device of the kind described, a combination of a reservoir chamber for liq uid; a mixing chamber for the passage of air or other gas; a passage connecting the two chambers; a carrier for the liquid adaptedto move through said passage from one chamber to the other, said carrier com prising two relatively movable parts; a cam for independently moving each of said parts, one of said cams comprising two cam sections; and means for adjusting one of said.

cam sections relatively to the other to vary the amount of relative movement between said parts, comprising a cam disk operatively connected to the first-mentioned cam section; a longitudinally shiftable sleeve mounted on said cam disk, and means for shiftin said sleeve to thereby move the cam disk re atively to said first mentioned cam section, substantially as described.

WALTER S. Jonas, Anna MARIE WALL. 

